Bi- and monostatic SAR-GMTI

Bi- and monostatic SAR-GMTI

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This chapter presents a novel simultaneous monostatic and bistatic ground moving target indication (GMTI) mode for improved target detection and imaging capability. The mode uses an airborne multichannel radar system and a stationary transmitter. Both systems transmit simultaneously on adjacent frequency bands, and the airborne multichannel system receives both its monostatic echoes and the bistatic returns. Geometrical diversity between the monostatic and the bistatic measurements enhances moving target-detection capabilities. Moreover, for movers detected in both datasets, an estimation of the target velocity vector (i.e., velocity and direction of motion) can be performed. By simply extracting a singlechannel dataset, this also allows correct focusing of moving targets both in monostatic and in bistatic datasets, if SAR-GMTI capability is required. Consequently, situational awareness over the observed area is greatly improved. The effectiveness of the proposed technique is analyzed both from a theoretical point of view and by means of an ad-hoc experiment conducted by the Fraunhofer Institute for High Frequency Physics and Radar Techniques (FHR) in fall 2013.

Chapter Contents:

  • Abstract
  • 9.1 Introduction
  • 9.2 Geometry for joint monostatic and bistatic SAR-GMTI
  • 9.3 Detection and localization performances
  • 9.4 Association of monostatic and bistatic detections
  • 9.4.1 Direct association in densely populated target scenarios
  • 9.4.2 Association by target tracking
  • 9.4.3 Simulation results
  • 9.5 Joint monostatic and bistatic SAR-GMTI
  • 9.6 Experimental results
  • 9.6.1 Moving target detection
  • 9.6.2 Imaging
  • 9.7 Conclusions
  • Appendix A: Data synchronization
  • Glossary
  • References

Inspec keywords: airborne radar; synthetic aperture radar; echo; object detection; radar imaging

Other keywords: monostatic SAR-GMTI; bi-static SAR-GMTI; motion velocity; stationary transmitter; motion direction; bistatic measurements; bistatic ground moving target indication; target velocity vector estimation; geometrical diversity; monostatic ground moving target indication; imaging capability; moving target-detection; monostatic echo; single channel dataset; Fraunhofer Institute for High Frequency Physics and Radar Techniques; monostatic measurements; GMTI mode; airborne multichannel radar system

Subjects: Radar theory; Optical, image and video signal processing; Radar equipment, systems and applications

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